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(No Model.)

0. BOHRINGER. STAMPED OR FOLDED METAL SHEETSPOOL FOR WINDING THREAD.

No. 492,657. Patented Feb. 28, 1893.

v the edges Z2 TATES CARL BOHRINGER, OF OFEENBURG, GERMANY.

STAMPED OR FOLDED METAL SHEET SPOOL FOR WINDING THREAD.

SPECIFICATION forming part of Letters Patent No. 492,657, dated February28, 1893.

' Application filed July 20, 1892. Serial No. 440,6l9. (No model.)

To all whom, it may concern:

Be it known that I, CARL BoHRINGER, a subject of the King ofWiirtemberg, residing in the city of Offenburg, Grand Duchy of Baden,Germany, have invented a certain new and useful Improvement in Stampedor Folded Metal Sheet Spools for WVinding Threads, of which thefollowing is a specification.

My invention consists in certain improvements in bobbins or spools andthe process of construction of the same and it will be first fullydescribed in connection with the drawings, and afterward specificallypointed out in the claims hereto appended.

In the accompanying drawings, Figure l is an elevation of a bobbinconstructed in accordance with my invention. Fig. 2 is a central,longitudinal section through the same. Fig. 3 is an end view thereof.Fig. at is a cross section through the same. Fig. 5 is a view of one ofthe blanks out of which the heads are made and Fig. 6 is a view of theblank out of which the tubular body is made.

Like letters of reference mark the same parts wherever they occur in theseveral figures.

The blank (Fig. 6) out of which the body is made is turned into a tubeand the edges a a lap seamed in any desired manner so that the tubecannot easily collapse, the joint appearing plainly in Fig. 4C. Theblanks for the heads are then passed over the ends of this tube, havinga central opening b of the diameter of the outside of the tube, topermit of this step. The teeth a at the ends of the tube are now turnedout at right angles to the tube and parallel to the head blanks andfinally Ward over these teeth flanges, thus securely attaching the partstogether and forming a complete bobbin consisting of tubular body a andflanged heads I).

of the head blanks are spun out- If desired, a disk of other material,at the proper time in the manufacture, may be placed on the tube sothat, when the bobbin is finished, it will lie between the head I) andthe flanged teeth, thus making a firmer and more solid construction.Such an extra disk might also be so placed as to come on the outside ofthe tooth flange so as to give greater solidity 5c and strength, andabetter, smoother appearance to the ends and such disk might be ofmaterial suitable to be printed upon, to form the label, and could beprinted either before or after putting it in place.

It will be seen that by my process my bobbin requires no solder and canbe readily and cheaply made.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is-

l. A bobbin consisting of a tubular body with toothed end flanges formedintegral with the body and turned at right angles thereto and headscomposed of washer disks having their edges turned over said flanges asset forth.

2. The bobbin herein described consisting of a lap seamed tubular bodywith end flanges composed of teeth turned outward at right angles to thebody and heads composed of washer disks mounted on the body inside thetooth flanges and having their edges turned over said tooth flanges, asset forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

DAVID EGLI, ERNEST THERON.

